Frank Marshman, CameraWiz, 1-800-471-8133. He does excellent work at a reasonable price, can fabricate parts if necessary, and in my experience won't charge you for something he can't fix, even if he puts some time into it.

I talked to Ken Ruth today. He still does repair and service the Medalist. To convert it to take 120 film it has to be taken apart so much that all the other cleaning and such would be part of that conversion process. Or, he can take it apart to just clean and service it. Amounts to almost the same thing either way.
Don't know what I'll do just yet.
thanks for the help.